Lubricator.



H. Af sWANsN.

LUBBIGAT/on.

APPLICATION FILED DBO. 12, 1908.

Patented July 20, 1909.

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LUBEIGATOB..

APPLHJATION FILED DEO. 12, VLQQB.

Patented July 20, 1'909.

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IIJALMAR A. SWANSON, OF

CHICAGO, ILLINOIS, ASSIGNOR TO `PRECISION' APPLIANCE OOJMIPAIT'Y,o OFCHICAGO, ILLINOIS, A

CORPORATION OF NEW JERSEY.

nUBRIcAToR.

Patented July 20, 1909.

Application filed December 12, 1908. Serial No 467,134

To all whom 'Lt may concern:

Be it known that I, HJALMAR A. SWAN a citizen of the United States 'ofAmerica, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inLubricators, of which the following is a specification.

This invention relates to' force feed lubrin cators, and has for itsobject tpvprovide a simple and etlicient structural arrangement andcombination ofv parts, which at each stroke of the pumping mec ianisinis adapted to force lubricant through a visible feed appliance and fromthence back through the pumping mechanism and to the bearing to belubricated, -all -will hereinafter more fully appear. f

In the accompanying drawings z-Figure 1 is a side elevation, with thecontaining casingrand its accessories in section. Fig-2, is

an end elevation with the aforesaid casing inl section. Fig. 3, is adetail horizontal sec-` tion on line Fig. 4, Fig. Ll, is aV detailvertical section on the irregular line Fig. 3. Y K

.Similar numerals of reference indicate like parts in the several views.Y

Referring to the drawings, l represents an open top casing adapted tocontain the lubricant. and provided with a cover or cap 2, to the underside of which the pumping mech anisin is secured so as to depend intothe nterior of the casing and-be submerged in the lubricant, as usual inthe present class of lubricators. l Y

3 is the carrying frame of the pump, having a flanged upper end by whichit is at' tachcd to the casing cover 2, and provided with bearing hubsfor the hereinafter vde-` scribed operating shaft and intermediate yokelever by which the pump plunger is operated. y l

4', is a vei'tical`pump housing, preferably formed as an integralportion of the pump carryinv frame 3, and formed with two bores ofdifferent. diameters and arranged in longigitudmal alinement to formupper and ber 6 withy the Achamber of the casing 1 ,and

l i l 1 lower piston chambers 51 and 6- for the difusual type 8 is acheck valve of the ball or other usual type controlling said port.

J is an outlet port or passage foi-ined in a lateral extension ofthepumpihousing; such port is arranged adjacent to the'low'er end of thelower piston chamber 6, and connects the saine with the visible feedappliance hereinafter described, and 10 is a check valve of the ball orother usual type controlling said port. another lateral extension' oftheump housing and connecting thelower'en ofLthe up#` per piston chamberwith the visible feed appllancebefore referred to',-'and 1-2 is'a Vcheckvalve of the ball or other usual type controlling'said port. 13 is anoutlet port orI passage'formed in still another lateral extension of thepump housing; such port is arranged' in ad3acent relation to the lowerend of the upper piston chamber 5y and connects `the saine with theoutlet pipe 14 which conducts the lubricant to the point where-it istobe used.

, 15 is a checkvalve of the rvball or other controlling.' the` aforesaidoutlet port 13. Infmy preferred construction the outlet pipe 14 passesthrough a ,stuffing box -oi gland 1G on the cover 2, so as to beremovable along with the cover and pumping mechanism;

.17 is a vertical pipe constituting a portion 1l is an inlet port orpassage. formed in y of the vvisible feed appliance above'referred Y to.Such pipe connects-at its lower Aend with the outlet port or passage 9of the lower pieton chamber '6, and extends yup through the cover and'isprovided with a curved discharge nozzle I8 yat its upper end, as. shown.i

Y 19 is a receiving tray or funnel carried by the cover 2 i'n a positionbeneath the nozzle 18, and adapted to receive the discharge. therefrom.

ZO is a pipe connecting the tray or funnel 1S with theinlet port orVpassage 11 of the upper pistn chamber 5to supply the same with thelubricant passing through the parts just described.

. 21 is a housing secui'edtothe cover 2 and in'closing the nozZlelS andtray 19,and pro.-

vided with a glazed orifice 22 through which. the discharge of thelubricant from the nozzle 1S can he clearly and w-readly observed.

Q8 is the differential pui'np piston or plunger formed with. a lowervportion QA- of anol diameter of the upper piston chamber 5 and sforming an individual piston or plunger therefor, and with an upperoperating portion 26 formed with an elongated slot 27 for the'receptiinisof an end of the operating. yoke lever and the means foradjusting the stroke of the piston. or plunger, as yhereinafter Inorefully described. Such upper portion 26 of the piston is preferablyformed separate from the piston proper and pinned or otherwise securedthereto, with a view to economy in manufacture. f

28 is the operating shaft ot` the pump pisv ton, journaled in one of thebefore mein 1 Vtioned hubs of the carrying frame 3; such shaft carriesIan ecceu-trie 29 and Worm` wheel 30, which worm wheel is driven by anendlessl worm 31 carried on a driving shaft f 32 joiirnaled in the lowerportion of the 5 casing l and extending through the same for connectionto a suitable power source i from which it receives rotation.

33, is a-yoke 'i'ever journaled on another i of-the hubs ofrthe carryingframe ih with f its yoke portioii adapted for operative eng gagemeiitfwith `the aforesaid eccentric 29,

while its opposite portion is in the. form of a straight arm thatextends into the vertical slot 27 of the upper .portion ot' the pumppiston to have operative engagement therewith. Y

34 is a vertical shaft extending down through the cover 2, with itslower portion screw-threaded and screwing through the;

upper end of the aforesaid piston portion vL6 and so that its lower endwill constitute an adjustable'iipper abutment for the piston operatingarm of the yoke lever 33, while the lowcrnabutment for such arm isformed by the upper end of the intermediate piston portion as shown. 1With the above described constiaiction the amount of lost motion for thearm of the yoke lever can be varied, and so that a minimum to a maximumstroke of the pump piston can be attained bv the vertical adjustment otthe' aforesaid shaft 34. I

Having thus described my sard invention what l claim as new and desiretosecure by- 1. ln a lubricator, the combination of a main containingeasing, a pump housing arranged in said casing and formed with a pair ofpump chambers in longitudinal alinement and having differentdiameters,`a series of lateral valve casings carried by the pumphousing, an inlet valve controlling a passage at the lower end of thelower pump chamber, an outlet valve inone of said va ve casingscontrolling an outlet passage near the lower )iston chamber 6, and i endof said lower )ump chamber, an inlet valve in another ofl said valvecasings controlling a passage having comniunication with the lower endof the uppei pump cliainber and with the outlet assage ot' the lower ofsaid valve casings controlling a passage near the lower end of saidupper pump chamber, ditferential pump pistons arranged in said pumpchambers and operatively connected together, and means for impartingreciprocatioei to said pistons, substantially i as set forth.

2. In a lubricator, the combination of a main containing casing, a pumphousing arranged in said casing and formed With a pair of pump chambersin longitudinal alinement and having diii'erent diameters, a seriesof'lateral valve casings carried by the pump phousing, an inlet valvecontrolling a passage it the lower end of the lower pump chamber, anoutlet valve in one ot said Valve casings controllingl an outlet passagenear the lower end of said lower pump chamber, an inlet valve inxanotherof said valve casings controlling a passage having con'imunication withthe lower end of the upper pump chainher and with the outlet passage ofthe lower pump chamber, an outlet valve in another of said valve casingscontrolling a passage near the lower end of 'said upper pump chamber,differential pump pistons arranged in said pump cliambers and oeratively connected together, a visible eed appliance arrangedintermediate of the pumplchamhers, and means for imparting reciprocation to said pistons, substantially as set fort-h.

3. In a' luhricatorI` the combination of a main containing casing, apump housing ar ranged in said casing and 'formed with a pair of pumpchambers in longitudinal alinement and having diti'erent diameters,asei'ies of lateral valve casings carried by the pump housing, an inletvalve controlling a passage at the lower end of the lower ump chainber,an outlet ralvc in one oi) said valve castings controlling an outletpassage near the lower end of said lower pump chamber, an inlet valve inanother of said valve casings controlling a passage having communicationwith the lower end of the upper pump chamber and with the outlet passageof the lower tim chamber, an outlet valve in anothero sai Valve casingscontrolling a passage near the lower endof said upper pump chamber,differential pump istons arranged in said pump chambers an operativelyconnected together, means for im parting reciproeation to said pistons,and means for adjusting the stroke of said pis tons, substantially asset forth.

4. Tn a lubricato'r, the combination of a v main containing casing, apump housing arranged in said casing and formed with a pair ot pumpchambers in longitudinal alineiuni i chamber an out et valve in anotherl l a the lower enfl' of said lower pump ati vel y. connected .ing.different diameters',

ment and having different diameters, a series of lateral valve casingscarried by the pump housing, an inlet valve controllingia passage at thelower end of the lower pump chamber, an outlet valve in one 'ot' saidvalve casings, controlling an outlet passage near i chamber, an inletvalve in another of said *valve casings controlling a passage havingcommunication with the lower end ot' theupper pump chamber and with theoutlet passage l of the lower pump chamber, an outlet valve iii anotherof said-valve casings controlling a passage) near thelower end of saidupper pump chamber, differential pump. pistons arranged in said pumpchambers and oper atively connected together, a visiblefeed appliancearranged intermediate ot' the pis- 4ton chambers, means tor impartingrecipro and means for acly cationy to said pistons,

substanjusting the stroke of said pistons, tiall'y as set forth.

ln a lubricator, the combination' of a pump housing formed with a pairof pump chambers in longitudinal alinement and having differentdiameters, a series of lateral valve easingscarried by thepump`liousing, an'inlet value controlling apassage at the lower end otthe lower pump chamber, an outlet valve in one ot said valve casingscontrolling an outlet passage near the lower end ot said lower'pumpchamber, an inlet valve in another ot' said valve casings controlling apassage having communication with 'the lower end of the upper pumpchamber and with the outlet passage of the lower pump chamber, an outletvalve in anothcr of said valve casings controlling a passage near thelower end of said upper pump chamber, differential pump pistons arrangedifi said pump chambers an'd opertogether, and means for impartingreciprocation to said pistons, substantially as set forth.

6, ln lubrieator, the combination ot' a pump housing formed with a pairof pump ch ambers in longitudinal alinementand hava series ot lateralvalve casings carried by the pump housing, an inlet valve controlling apassage at the lower end of the lower pump chamber, an

out-let valve in ,one of said Uvalve casingsy trolling a passage havingcommunication Vwith the lower end of the upper pump' chamber and withthe outlet passage'of the lower pump chamber, an outlet valve in anotherot` said 4valve casings controlling a'pa-ssage near the lower .end ofsaid upper pump chamber, ditterential pump pistons arranged in said pumpchambers and operatively connected together, a visible feed appliancear- 'ranged intermediate of the pump chambers,

and means for -imparting reciprocation to said pistons, substantially asset forti-'1. p

'i'. In `a lubricator, the combination of a pump housing formed with apairy of pum chambers in longitudinal alinement an having differentdiameters, a series offlatera-l valve casings'carried by the pumphousing, an inlet ,valve controlling a passage at the lower end .of thelower pump chamber, an

outlet valve in one of said valve casings con- V trolling an outletpassage near the Alower end oi said lower puinp'chamber, aninlet valvein another ot said valve casings controlling a passage havingcommunication with the' lower end of the upper pump chamber and with theoutlet passage ot the lower pump chamber, an outlet valve in another oi:said valve casings controlling a passage near the lower end of saidupper pumpchamber, ditt'erential pump pistons arranged in said pumpchambers and Ioperatively -connected together, a visible feed appliancearranged intern'iediate ot the pump chambers, means for impartingreciprocation to said pistons, and means toi' adjusting the stroke ofsaid pistons,- substantially as set forth.

S. ln a' lubricator, pump housing `formed with ay pairof pump' chambersinv longitudinal alineinentand having different diameters, a. series oflateral valve casings carried by jthe pump housing, an inlet 'valvecontrolling ii ,passage at the lower end of the lower pump chamber, an

outlet valve in one trolling an outlet passagenear ot said lower pumpchamber,

chamber, an out ety valve in another of said if'alvccasings controllinga lpassage near the lower end of said upper pump chamber, differentialpiiuip-i'iistons, arranged in said pump chambers and operatively'connected together, means for imparting reciprocation to saidpisto1is,'aii`d means for adjusting the stroke of' said pistons,substantially set forth.

t). .ln a lu'bricator, the combination of i main containing casing, apump housing ar 'anged iii said-casing and formed with i pair of pumpchambers. in longitudina alincinent and having different diameters, iseries of lateral valve casings carried by th pump housing, an inletvalve controlling i passage at the lower end of the Vlower puin chamber,an outlet valve in one of said valv casings controlling an outletpassage nea 'the lower cud ot said lower punipchambei an inlet. valve inanother ot said valve caf ings controlling a passage having commun ofthe lower pump chamber,an outlet vali the combination of 'a ranged insaid pump chambers and operatively connected together, and means forimparting reciprocation to said pistons, the saine comprising anoperating shaft carrying an eccentric and a yoke lever enga-ging saideccentric and provided with an arm engaging the pump pistons,substantially as set forth.

10. In a lubricator, the combination of a main containing casing, apumphousing arranged in said casing .and formed with a 'pair of pumpchambers in longitudinal alineineiit and having different diameters, aseries ot' lateral valve casiiigs carried by the pump housing, an inletvalve controlling a passage at the lower end of the lower pump chamber,an outlet valve in one of said valve casings controlling Van outletpassage near the lower end of said lower pump chamber, an inlet valve inanother of said valve casiiigs controlling a passage having communication with the lower end ot' the upper pump chamber and with the outletpassage of the lower pump chamber, an outlet valve in another of saidvalve casings controlling -a passage near the lower end of said upper`pump cliainbcr, differential pump pistons arranged in said4 pumpcliaiiibei's-and operatively connecte together, ,a visible Icedappliance arranged intermediate ofthe pump i chambers, and means forimparting recipro, cation to said pistons, the saine comprisine anoperating shaft carrying an eccentric an a yoke lever engaging saideccentric and provided with anarm engaging the pump pistons,substantially as setforth.

1l. ln a lubricator, the combination of a main containing casing, a pumphousing arranged in said casing and formed with a' pair of pump chambersin longitudinal alinenient and having ditt'erent diameters, a series oflateral valve casingsfcarried b the pump housing, an inlet valve controling a passage at the lower end of the lower pump chamber, an outletvalve in one of said valve casings controlling an outlet passage nearthe lower end of said lower pump chamber, an inlet valvein another ofsaid valve casings controlling a passage having communivcation with thelower end of the upper pump cliauibe-r and with the outlet passage ofthe lower pump chamber, an outlet valve in auotlier ot' said valvecasings controlling a passage near thel lower end ot said upper pumpchamber, differential pump pistons arranged in said pump chambers andoperatively connected together, means for imparting reciprocation tosaid pistons, the same comprisinv an operating shaft carrying aneccentric, an a yoke lever engaging said eccentric and provided with anarm engaging thc pump pistons, and means for adjusting the stroke. ofsaid pistons, substantially as set forth.

12. [n a lubricator, the combination of a main containing casing, a pumphousing ar ranged in said casing and formed with a pair of pump chambersin longitudinal alinenient and having different diameters, a series oflateral valve casings carried by the pump housinn', an inlet valvecontrolling a passage at the ower end of the lower pump chainber, anoutlet valve in one ot' said valve cas-' ings controlling an outletpassage near the lower end ofsaid lower pump chamber, an inlet valve inanother of said valve casings controlling a passage having communicationwith the lower end of the upper pump chamber and with the outlet assageof the lower pump chamber, an out et valve in another ot' said valvecasings controlling a passage near the lower end of said upper pumpchamber, differential pump pistons arranged iii said lpump chambers ando )eratively connected together. a visible feev appliance arrangedintermediatt` ot the pum chambers, means tor imparting rcciprocatiomtosaid pistons, the same comprising an operating shaft carrying aneccentric, and a yoke lever engaging said eccentric and provided with anarm engaging the pump pistons, and means for adpisting the stroke of thepis tons, substantially as set forth.

13. ln a lubricator, the combination of a pump housing formed with apair of ump chambers in longitudinal alinement. an havin' diti'ereiitdiameters, a series of lateral va ve casings carried Aby the pumphousing, an inlet valve. controlling a passage at the` lower end of thelowei pump chamber, an outlet valve in one otl said valve casingscontrolling an outlet passage near the lower end of said lower pumpchamber, an inlet valve in another otl said valve casings controlling apassage having communication with the lower end of the upper pumpchamber and with the outlet passage of the. lower um' chamber, an outletvalve in another o Sai valve casings controlling apassage near th'elower end of said upper pump cliamber,.dif, l

erential pump pistons arranged in Said pump chambers and operativelyconnected together, and means for impartingA reciprocation to saidpistons, the same comprising anoperating shaft carrying an eccentric anda yoke lever engaging the eccentric and provided with an arnrengagingthe. tons, substantially as set forth.

14. ln a lubricator, the com ination of 'a pump housing formed with apair of ump chambers in longitudinal alinement an havin dierentdiameters, a series of lateral lva ve casings carried by th pumphousing, an inlet valve controlling a passage at the lower end of thelower pu p'chambe,

an outlet valve in one of said' valvecas-v puma Pis' f the' lower endofsaidV lower pump chamvrvalve casings controlling a ing commumcationlet passage of ber,` an inlet; valve in another` of said with the lower'end of' the upper. pump chamber 'and with the outt-he lower pumpchamber, an outlet valve in another of said valve casings the lowerI endof said upper pump chamber, differential pump pistons arranged in `saidpump chambers, and operatively connected together, means for impartingreciprocation tosaid pistons,

- the same comprising an operating shaft Carrying an eccentric and Aayoke lever en gaging the eccentric and provided with an arm engagingthe-pump pistons, and means for adjusting t-he stroke of said pump pis?.

` tons, substantially as set forth.

lubricator, the4 combination ofa a pump housing v 15. In a maincontaininv casing,

' arranged in sai casing and formed with a l i pair of pump chambers inlongitudinal aline- "fa passage atthe chamber,` vanoutlet valve in voneof A valve-casings controlling an outlet passage mentand havingdifferent diameters, a series of lateral valve casings carried bythepump housing, an inlet valve controlling lower end of the lower pumpsaid near the vlower end of said lower pump chambeig'an inlet valve inanother nf said valve casings controlling a passage having communicationwith the lower end of the y upper pump chamber and with theoutletchamber,

"said upper pump chamber, pistons arrangedin said .pump chambers anvoperatively connected together,

' alinement and passage ofthe lower pump chamber, an outet valve. inanther of saidvalve casing's controlling a passage near theilower end ofdifferential pumpl said pistons having'anoperating portion provided witha vertical slot,'an operating, shaft carrying an eccentric, a yoke leverengaging said eccentric, and provided with an arm-engaging intheaforesaidvvertical slot, and an adpistable abutment screw passingthrough the operating portion of the pistons and projecthg into saidslot, substantiallyas set forth.

16.111. a'. lubricator, the combination of a'main containing casing, za'ump housing arranged in said casing and ormed with a pairy of' pumpchambers, longitudinal having different diameters, a series of lateralvalve casings carried by the pump housing, an inlet valve controlling apassage at th lower end of the lower pump an outlet valve in one ofsaid'valve' casings .controlling an' outlet passage near the lower endof said lowerpump chamber, an inlet valvev in anotherfof said valvecasings controlling a passa ehaving communication with the lower en ofthe upper pump chamber and with the outlet passage of theAv lower pumpchamber," an outlet valve in passage hav- A`lever engaging said i withan arm engaging in` the aforesaid veranother of said valve casingscontrolling a passage near` the lower end of said upper lpump chamber,differential pump pistons i arranged in said pump chambers and operlatively connected. together, said pistons havl ing an operating portionprovided with a l vertical slot, a visible' feed appliance arl rangedintermediate ofthe pump chambers, e

an `operating shaft carrying an eccentric, a yoke lever engaging saideccentric and provided with an arm engaging in the aforesaid vertical'slot, and Y i screw passing through the operating portion of the pistonsand projecting into said slot, substantially as set forth.

1T. In a lubricator, the combination of a pump housing formed with apair of pump chambers in longitudinal alinement and. having dierentdiameters, a series of lat-eral valve casings carried by the pumphousing, an. inlet valve controlling a passage at the lower end of thelower pump chamber, an outlet valve in one of said valve casingscontrolling an outletvpassage near the lower end of said lowerpumpvchamber, an inlet valve in another of said valve casingscontrolling a passage having communication with the lower end of theupper pumpichamber and with the out-let passage of the lower umpchamber, an outlet valve in another o said valve casings controlling a'passage near the lower end ofsaid upper pump chamber, differential pumppistons arranged 1n said pum c bersand operatively connecte ham togeter,

said pistons having an operating portion provided with a vertical slot,an operating shaft carrying an' eccentric, a yoke eccentricvand providedtical slot, andan adjustable abutment screw passing through the upperend of said operating portion of thel pistons andv pro]ecting into said,slot, substantially as set forth.v

18. In a lubricator, the combination of a pump housing formed with apair of pump chambers in longitudinal alinement and having d ierentdiameters, a series of lateral valve casingscarried by the pump housing,an inletfyalv controlling a passage at the lower endof the;` lower pumpchamber, an outlet valve in one of 'said valve casings cont'rollin an.outlet passage near the lower end in another' of said va flower end of"the upper with the chamber, valve-Casin istons having an tprov' ed witha vertical plot, a'jvisib e feed of sai lower pump chamber, an inletvalve lve casings controlling` l a'passage having communicationWitliLthe chamber. .grid

an ad]ustable abutment iio near the j an eccentric, a yoke leverengaging said eecentric and provided with an arm engaging' in theaforesaid verti )al slot, and an adjustable abutmellt screw passingthrough the upper end. of said operating portion ot the pistons andprojecting into sarl slot, sub'- stantially as setforth.

1t). In a lubrieator, the combination oi' a main containing' easing,apump housing arranged in said easing and- .toi'mcdavitli a pair ofpump. chambers in longltudinal alineient a'ndia'ving differentdiameters, a seriesola'teral valve casings carried by the pump housine',an inlet valve controlling a passage at the lower end of the lower pumpchamber. an outlet valve in one of said valve casings controlling anoutlet passage near the lower end of said lower pump chamber, an inletvalve in another of said valve cas ings controllinga passage havingcommunication with the lower end of the upper pump chamber and with theoutlet passage of the lower pump chamber, an outlet valve in another ofsaid valve casings controllinga passage near the lower end of said upperpump chamber, differential pump pistons arranged in said pump chambersand operatively connected together, a vertical pipe connected to theoutlet passage of the lower pump chamber and having a downturncd nozzleat its upper end, a receiving funnel arranged beneath 'said nozzle, apipe connecting said funnel with the inlet passage of the upper ptunpchamber, a housing inclosing said nozzle and funnel and provided with aglazed orifice. means .for ,imparting reciprocationl to said pistons,and means for adjusting the stroke-of said pistons, substantially as setforth.

20. In a lubricator, the combination of a pump housing formed with apair oi pump chambers in longitudinal alinement and havin@ differentldlameters, a series of lateral va ve casino-s carried by the pumphousing, an inlet valve controlling a .passage at the lower end of thelower pump chamber, an outlet. valve in one of said valve oasingscontrolling an outlet passage near the lower end of said lower pumpchamber, an inlet valve in another trolling a passage havingconnnunlcation with the lower end of the. upper pump ehami i i of saidvalve casinos erin ber and with the. outlet passage of the lower pumpchamber, an out al' said valve casings controlling a passage near thelower end of said upper pump chamber, differential pump pistons arrangedin lsaid pump chambers and operativelyconnected together. a verticalpipe connected to the outlet passage of the lower pump chamber andhaving a downturned nozzle at its upper end, a receiving funnel arrangedbeneath said nozzle, a pipe can. -'ting said tunnel with the inletpassage oi the upper pump chamber, a housing inelosing said nozzie andfunnel and provided with a glazed orifice, and meansy for imparting'reciprocation to said pistons. substantially as set forth.

21. ln a lubricator, the cnnbination' of a pump housing formed with apair of pump chambers in longitudinal alinement and hav- `Anigditl'ercnt diameters, a series of lateral valve casings carried b v thepump housing, an .inlet valve controlling a passage at the lower end othe lower punip chamber, an outlet valve in one ot' said valve casingscontrolling an outlet passage near the lower end of said lower pumpchamber, an inlet falve in another of said valve easings controlling apassage having communication with the lower end of the upper pumpchamberand with the outlet passage of the lower pump chamber, an outletvalve in anotherof said valve casings controlling a passage near thelower end of said upper pump chamber, ditterential pump pistonsarranged' 1n said pump chambersand operativfy'fconnected together, avertical pipe connected to theoutlet passage of the lower pump chamberand having a downturned nozzle at its upper end, a receiving funnelarranged beneath said nozzle, a pipe connecting said funnel with theinlet passage of the upper pump chamber, ahousing inclosing said nozzleand funnel and 'provided with a glazed orilice, means for impartinreciprocation to said pistons and meansl or,ad'pust ing the stroke ofsaid pistons, substantially as set forth.

Signed at tlhicago, Illinois, this' 10th dav of December 1908. l

ILTALMAR SVVANSON, lVit nesses t i vROBERT B URNs, HENRY Mon.

let valve in another'

